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Finding the Fourth Proportional to 1,447.70, 2,171.34 and 523.22

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Solution

The fourth proportional to 1,447.70, 2,171.34 and 523.22 is: 784.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.70 : 2,171.34 = 523.22 : x
  2. Step 2: Convert to fraction form
    1,447.70/2,171.34 = 523.22/x
  3. Step 3: Cross multiply
    1,447.70x = 2,171.34 × 523.22
  4. Step 4: Simplify right side
    1,447.70x = 1,136,088.51
  5. Step 5: Solve for x
    x = 1,136,088.51/1,447.70
  6. Step 6: Final answer
    x = 784.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.